I've seen that Tom (and others) turn off their CO2 at lights out to avoid excessive CO2 buildup while plants are not using it.
Is this necessary if your CO2 is hooked up to a pH controller? The CO2 saving is minimal anyway because of the amount of CO2 needed to bring the pH back down to where you want it when the lights go on...
I tried hooking up my pH controller (pH set to 6.6) to a timer and when the pH controller kicks back in an hour before lights on, the pH has gone up to 7.3. At my bubble rate, the pH comes back down to 6.6 after about 2-3 hours.
I'm a bit worried about the 0.7 pH swing and am thinking of taking the controller off of the timer as their shouldn't be any risk of CO2 excess at night?
Is this necessary if your CO2 is hooked up to a pH controller? The CO2 saving is minimal anyway because of the amount of CO2 needed to bring the pH back down to where you want it when the lights go on...
I tried hooking up my pH controller (pH set to 6.6) to a timer and when the pH controller kicks back in an hour before lights on, the pH has gone up to 7.3. At my bubble rate, the pH comes back down to 6.6 after about 2-3 hours.
I'm a bit worried about the 0.7 pH swing and am thinking of taking the controller off of the timer as their shouldn't be any risk of CO2 excess at night?